Finding the Fourth Proportional to 21,116.50, 31,674.14 and 5,321.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,116.50 : 31,674.14 = 5,321.50 : x
2. Step 2: Convert to fraction form
   21,116.50/31,674.14 = 5,321.50/x
3. Step 3: Cross multiply
   21,116.50x = 31,674.14 × 5,321.50
4. Step 4: Simplify right side
   21,116.50x = 168,553,850.17
5. Step 5: Solve for x
   x = 168,553,850.17/21,116.50
6. Step 6: Final answer
   x = 7,982.09